Fix multi-line string

Author: jhrozek

docs/toolhive/tutorials/vault-integration.mdx

@@ -185,8 +185,7 @@ spec:
           vault.hashicorp.com/role: 'toolhive-mcp-workloads'
 
           # Inject GitHub configuration secret
-          vault.hashicorp.com/agent-inject-secret-github-config:
-            \ "workload-secrets/data/github-mcp/config"
+          vault.hashicorp.com/agent-inject-secret-github-config: 'workload-secrets/data/github-mcp/config'
           vault.hashicorp.com/agent-inject-template-github-config: |
             {{- with secret "workload-secrets/data/github-mcp/config" -}}
             GITHUB_PERSONAL_ACCESS_TOKEN={{ .Data.data.token }}